These events range from minor operational problems to permanent spacecraft failures.
Australia, Canada, Germany, India, Japan, United Kingdom, and the United States have
contributed data. This data base of known satellite anomalies is used to study and
identify trends in the anomalous behavior of different families of satellites. The
trends include seasonal groupings, diurnal groupings, and anomaly types indicative
of certain satellite types and manufacturers. Corrections are done with several Solar-terrestrial
data sets. Specifically, geomagnetic activity has been found to have significant effects
on satellite behavior. Solar activity and cosmic rays have also proven to be important
in the anomalous behavior of satellites. Information provided by this program can
be used in the design phase of spacecraft to prevent the propagation of problems from
one spacecraft to the next. This information can also be used by operations personnel
to anticipate periods of anomalous behavior based on the proven response of an existing
craft to environmental conditions.